Unit labour cost
The average labour cost per unit of output — a key driver of services inflation.
In plain words
Unit labour cost (ULC) measures how much labour a business needs to produce one unit of output. It combines two things: how much workers are paid, and how much they produce. If wages rise 5% but each worker produces 2% more, ULC rises by about 3%. Businesses facing rising ULCs can absorb them (accepting lower profits) or pass them on as higher prices. In labour-intensive industries like hospitality, retail and education, ULC changes flow through to consumer prices with a relatively short lag.
How it's measured
The OECD publishes ULC data for its member countries, as does the Eurostat Labour Cost Index for the EU. In the US, the BLS Productivity and Costs release covers quarterly ULC data by sector. Central banks typically focus on private-sector ULCs in the services sector as the most relevant leading indicator for inflation pressure.
Why it matters
ULC growth is the bridge between the labour market and inflation. When central banks say they are "data-dependent" and watching for signs that wage growth is feeding into prices, they are tracking ULCs — not just headline wage growth. A labour market that produces high wage growth and high productivity growth is far less inflationary than one where wages rise without productivity gains. This distinction matters for understanding why strong employment can coexist with falling inflation in some episodes.
Frequently asked questions
What is the formula for unit labour cost?
Unit Labour Cost (ULC) = Total labour costs / Total output. Equivalently, ULC growth ≈ Wage growth − Productivity growth. If wages rise 5% and productivity rises 1%, ULC rises approximately 4%. This 4% is available to be passed on into prices. Central banks and labour economists track ULC growth as a leading indicator of domestically-generated inflation — particularly services inflation.
Why do central banks care so much about unit labour costs?
Services prices — which account for 50–60% of the CPI in most advanced economies — are predominantly determined by labour costs. If wages grow much faster than productivity, businesses face cost pressure that eventually passes through into prices. This is why the ECB, Bank of England and Federal Reserve all closely monitor ULC growth alongside services CPI. Sustained ULC growth above ~3% is typically inconsistent with 2% services inflation.